What are the requirements for brown aluminum oxide for grinding glass?
When grinding glass, the choice of brown aluminum oxide needs to be determined according to the specific processing stage and needs. The following are the main recommended types and applicable scopes:
Grit selection
Coarse grinding stage: It is recommended to use brown aluminum oxide sand F120 (125-106 microns), which is suitable for sandblasting glass surface treatment or preliminary removal of glass burrs.
Fine grinding: It is recommended to choose brown aluminum oxide 100-320mesh, which is suitable for precision grinding of glassware, optical lenses, etc., which can effectively eliminate scratches and improve surface finish.
Ultra-fine polishing: If higher flatness is required, it can be matched with micro-powder-grade brown aluminum oxide 240-3000mesh, which is used for polishing composite materials such as carbon fiber and metal, but it needs to be adjusted in combination with other processes.
Performance advantages
The hardness of brown aluminum oxide reaches Mohs 9, second only to diamond, and can efficiently cut the glass surface.
The particles have a multi-angular structure and good self-sharpening properties. New cutting edges are continuously produced during the grinding process, extending the service life.
The chemical properties are stable, acid and alkali corrosion resistant, and the secondary damage to the glass material during processing is reduced.
Application scenario examples
Sandblasting glass processing: F120 brown aluminum oxide is used for matte treatment or pattern engraving on the glass surface.
Optical glass polishing: 100-320 mesh brown aluminum oxide is used for grinding and polishing of precision devices such as lenses and cathode ray tubes.
Glass edge processing: 60-80 mesh brown aluminum oxide is used for glass burr trimming after water jet cutting.
Precautions
Grinding pressure and time need to be adjusted according to the thickness and hardness of the glass to avoid excessive wear.
It is recommended to cooperate with the recycling system during sandblasting to reduce the consumption of brown aluminum oxide.
In summary, the grinding glass should give priority to brown aluminum oxide with moderate particle size (100-320 mesh) and high purity, taking into account both efficiency and surface quality.